Observation 228092: Caloplaca Th. Fr.

A strangely discoloured yellow-orange species.


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By: Jason Hollinger (jason)
2016-01-17 22:42:55 PST (-0800)

I didn’t realize C. luteominia could have a gray thallus. Maybe this isn’t so strange as I thought. What an insanely variable species. And yes, C. atroflava can’t be completely ruled out based on the meager description in the Sonoran Flora. (I’ve never seen it.)

I think this is a dry one
By: James Bailey (Silversea_Starsong)
2016-01-17 18:00:27 PST (-0800)

see if this helps http://mushroomobserver.org/228150

It does seem to have a dark thallus doesn’t it?

Ha, that’s actually the same specimen isn’t it!? Amazing how much changes over only a few hours.

Tough break.
By: James Bailey (Silversea_Starsong)
2016-01-17 13:47:22 PST (-0800)

Yeah I don’t think I could easily detach any of the rocks here.

Sounds like a taxonomic nightmare for sure.

How far are you willing to go? :)
By: Jason Hollinger (jason)
2016-01-17 13:27:41 PST (-0800)

For starters a photo when it’s dry. Also closer photo if at all possible to see if there are soredia/blastidia/isidia on the gray parts. Wouldn’t hurt to do a K test just to rule out Candelariella for sure.

An actual specimen — hard as it will be to get it, by the look of it :( — is of course the ideal. But there’s no one to send it to at the moment. There are so many undescribed species, and many of the ones that are described are so poorly understood, that even a local expert like Kerry can only do so much.

It’s a frustrating time in the world of Caloplaca. There’s some folks in eastern Europe working hard on it, but the results are still so preliminary that they’re barely useful. And there’s no way for local lichenologists to contribute. Hell, there’s no way to even know if a specimen in hand has a name or not. :( I’ve got a whole box of such specimens.

It’s very common at this location.
By: James Bailey (Silversea_Starsong)
2016-01-17 12:58:43 PST (-0800)

But I’ve not seen it elsewhere, or indeed at this location before late 2015.

Can you see the thallus there? I can’t see it that well, not sure I’m seeing it at all.

Anything that might help?

Neat specimen!
By: Jason Hollinger (jason)
2016-01-17 12:55:00 PST (-0800)

I can’t imagine what this is. I wouldn’t rule out Candelariella entirely, but don’t know any species of Candelariella with gray thallus which occur on rock. Could it be something close to Caloplaca chlorina??

Created: 2016-01-17 11:24:43 PST (-0800)
Last modified: 2016-01-17 22:40:15 PST (-0800)
Viewed: 59 times, last viewed: 2017-06-21 07:56:49 PDT (-0700)
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